Enhanced photoelectrocatalytic activity of Cr-doped TiO2 nanotubes modified with polyaniline |
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| Affiliation: | 1. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, PR China;2. School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, Wuhan 430074, PR China;1. School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, China;2. Institute of Condensed State Physics, Jilin Normal University, Siping 136000, China;3. Department of Chemistry, Purdue University, West Lafayette 47907, United States;1. College of Environment and Materials Engineering, Yantai University, 32, Qingquan RD, Laishan District, Yantai 264005, China;2. Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan;3. Department of Environmental Engineering, National I-Lan University, No. 1 Sheen-Long Road, Ilan 260, Taiwan;1. Department of Electrical Engineering, Technological-Educational Institute of Western Greece, GR-26334 Patras, Greece;2. Physics Department, University of Patras, 26500 Patras, Greece;1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Rd, Shanghai 200240, PR China;2. Key Laboratory of Thin Film and Microfabrication Technology, Ministry of Education, Shanghai 200240, PR China;3. Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China;1. Department of Physics, National Engineering College, Kovilpatti, India;2. Department of Physics, S.T. Hindu College, Nagercoil, India;3. ECMS Division, CSIR-CECRI, Karaikudi, India |
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| Abstract: | ![]()
A facile method for preparation of Cr-doped TiO2 nanotubes (Cr–TiO2 NTs) modified with polyaniline (PANI) was developed. The obtained materials were analyzed with scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR) spectroscopy. The photoelectrochemical property of PANI/Cr–TiO2 nanotubes was studied by voltammetry, photocurrent and electrochemical impedance spectroscopy (EIS). Using PANI/Cr–TiO2 NTs as photoanode, the removal of p-nitrophenol (PNP) by photoelectrocatalytic oxidation technique was investigated. Compared with Cr–TiO2 NTs, PANI/Cr–TiO2 NTs showed an increased efficiency in the photoelectrocatalytic degradation of PNP. Moreover, photoelectrocatalysis was more efficient for PNP degradation than electrochemical oxidation, direct photolysis, and photocatalysis. The influences of applied bias potential, initial concentration of PNP and solution pH on the photoelectrocatalytic degradation of PNP were investigated. Under optimized conditions, almost all PNP could be degraded on PANI/Cr–TiO2 NTs after 2-h photoelectrocatalytic treatment. |
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| Keywords: | Polyaniline Photoeletrocatalytic |
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